The ban on provocative or suggestive content means its unlikely that swimsuit apps like an app featuring Sports Illustrated's swimsuit models will come to the phone anytime soon. And the ban on app suggesting prostitution may make it tough for apps like Grand Theft Auto to reach the phone in all their glory.

It's unclear whether these prohibitions existed in the Windows Mobile 6.x marketplace era, but were merely not broadly publicized or are something new. What is clear is that Microsoft is taking a hard-nosed stance when it comes to sexual content and is making it absolutely clear that it will not be tolerated in the Windows Phone 7 ecosystem.